'Why did I come on this show?' Alison Hammond leaves Ruth Langsford in hysterics as she brands herself 'fat' on fitness-themed This Morning... after Eamonn Holmes calls in sick

Alison Hammond was drafted in to co-host This Morning on Friday, after Eamonn Holmes left Ruth Langsford flying solo because he was in bed with a cold.

And while Alison seemed more than happy to join Ruth at the start of the show, she soon began to realise the show's content was bound to make her feel bad about herself.

The ever-cheerful host, who has always embraced her natural curves, asked Ruth 'why did I come on this show' as each topic seemed to be related to losing weight, dieting and fitness.

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'Why did I come on this show?' Alison Hammond left Ruth Langsford in hysterics as she branded herself 'fat' on a fitness-themed This Morning... after Eamonn Holmes called in sick

Having just interviewed a woman who lost seven stone after deciding she couldn't be a nurse, telling people to lose weight, when she was obese herself, Ruth teased that the next segment was about healthy eating.

She also noted that after that, there would be a segment about exercising five times a week to keep as fit as possible.

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An exasperated Alison - who has admitted she doesn't care for exercise and loves to eat sweet foods - left Ruth in hysterics as she joked that this had been a show she could have easily skipped.

Alison had been in her pajamas at home when she got the call that morning to come into ITV studios and fill in for laid-up Eamonn.

Up for a love: The ever-cheerful host, who has always embraced her natural curves, asked Ruth 'why did I come on this show' as each topic seemed to be related to losing weight, dieting and fitness

Gal pals: An exasperated Alison - who has admitted she doesn't care for exercise and loves to eat sweet foods - left Ruth in hysterics as she joked that this had been a show she could have easily skipped

Seeing the funny side: Having just interviewed a woman who lost seven stone after deciding she couldn't be a nurse, telling people to lose weight, when she was obese herself, Ruth teased that the next segment was about healthy eating

As the show kicked off with a solitary Ruth, she said to the camera 'They're dropping like flies in my house. Jack [her son] was off all week with the lergy, and this morning Eamonn woke up with no voice. He was literally having to write notes.'

Alison revealed: 'I woke up, was getting my son ready for school, was going to go to the gym as you do and then I get a message from boss saying "Al, can you do the show?"

'And I thought about ignoring it and then I thought about Ruth on her own and I couldn't.'

Alison rushed down from Birmingham to host the show in place of Eamonn - who tweeted from his sick bed: 'Things not good today folks. Got an impossibly sore throat. Don't need this - sooo much to do - but unfortunately Talking is my business. Bloomin Heck it hurts [sic].'

Filling in: Alison rushed down from Birmingham to host the show in place of Eamonn - who tweeted from his sick bed 'Things not good today folks. Got an impossibly sore throat. Don't need this - sooo much to do - but unfortunately Talking is my business. Bloomin Heck it hurts [sic]'